A little heavy in pocket, but longest spin time. Over 4 minutes.
Good product for home use or for challenging others to spin endurance competitions!
One downside is that this spinner will not spin on a tabletop, since the counterweights will lock in place with verticle pressure placed under them. Hand spinning only. However... longest spin times expected!!!
You can feel strong centrifical forces when moving the spinner at angles while spinning in your hand.
Not good for small children that can hurt their knuckles should they get caught in the powerful spin path.